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$256+ Cheap flights from Fremont, CA to Sofia (SOF)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/9. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — SOF
Aug 5 — Aug 121
Tue 8/5
Tue 8/12
1 adult, Economy
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Cheapflights Tip: The best prices from Fremont to Sofia are usually found in January or March, booked 86 days in advance, depart on a Thursday or Sunday and return on a Saturday

Cheap flight deals from Fremont to Sofia

Keep the following information in mind while searching for Fremont to Sofia flight deals. Data was last updated July 31, 2025.

Round-trip from

$553
(Justfly.com)

One-way from

$256
(Kiwi.com)

Popular in

June

Cheapest in

January

Average price

$1,092
From Fremont to Sofia
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One-way flight from Fremont to Sofia
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Highest demand for flights based on searches. 28% potential increase in price ($347 potential increase over avg. RT price).
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Cheapest flight prices on average. 7% potential price decrease ($63 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Find flight deals from Fremont to Sofia

Cheapest flights from Fremont to Sofia
Explore the most affordable flight options available from Fremont to Sofia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 31, 2025.

This Justfly.com deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/116:45 pmSFO - SOF
1 stop27h 50mTurkish Airlines
Tue 8/263:35 pmSOF - SFO
1 stop29h 00mTurkish Airlines
Deal found 7/30$553
This Trip.com deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/296:00 pmSFO - SOF
2 stops46h 30mMultiple Airlines
Wed 11/128:55 pmSOF - SFO
2 stops51h 40mMultiple Airlines
Deal found 7/31$589
This lol.travel deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/119:05 pmSFO - SOF
1 stop15h 55mUnited Airlines
Tue 8/262:00 pmSOF - SFO
1 stop15h 50mUnited Airlines
Deal found 7/30$590
This Ovago deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/18:40 pmSFO - SOF
1 stop37h 30mBritish Airways
Mon 12/155:25 pmSOF - SFO
1 stop35h 20mBritish Airways
Deal found 7/31$592
This Travelocity deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2811:11 amSFO - SOF
2 stops22h 09mAir Canada
Tue 11/116:00 amSOF - SFO
2 stops25h 22mAir Canada
Deal found 7/30$600
This American Airlines deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/111:50 pmSFO - SOF
2 stops34h 20mAmerican Airlines
Mon 12/155:25 pmSOF - SFO
2 stops35h 24mAmerican Airlines
Deal found 7/31$610
This Kiwi.com deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/302:40 pmSFO - SOF
1 stop17h 25mLufthansa
Sun 12/141:55 pmSOF - SFO
1 stop15h 40mLufthansa
Deal found 7/30$614

Cheapflights Fare Finder

 
Customize your flight search to find flights from Fremont to Sofia that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 31, 2025.
Use the filters below to find and compare flights from Fremont to Sofia that are best for you.

Fly from

Fremont

Fly to

Sofia

Route

Depart

Return

Price

San FranciscoSofia

SFO - SOF

SFOSOF

San Francisco

Mon 8/11

6:45 pm-8:35 am

1 stop27h 50m

Sofia

Tue 8/26

3:35 pm-10:35 am

1 stop29h 00m

$553

San FranciscoSofia

SFO - SOF

SFOSOF

San Francisco

Wed 10/29

6:00 pm-1:30 am

2 stops46h 30m

Sofia

Wed 11/12

8:55 pm-2:35 pm

2 stops51h 40m

$589

San FranciscoSofia

SFO - SOF

SFOSOF

San Francisco

Mon 8/11

9:05 pm-11:00 pm

1 stop15h 55m

Sofia

Tue 8/26

2:00 pm-7:50 pm

1 stop15h 50m

$590

San FranciscoSofia

SFO - SOF

SFOSOF

San Francisco

Mon 12/1

8:40 pm-8:10 pm

1 stop37h 30m

Sofia

Mon 12/15

5:25 pm-6:45 pm

1 stop35h 20m

$592

San FranciscoSofia

SFO - SOF

SFOSOF

San Francisco

Tue 10/28

11:11 am-6:20 pm

2 stops22h 09m

Sofia

Tue 11/11

6:00 am-9:22 pm

2 stops25h 22m

$600

San FranciscoSofia

SFO - SOF

SFOSOF

San Francisco

Mon 12/1

11:50 pm-8:10 pm

2 stops34h 20m

Sofia

Mon 12/15

5:25 pm-6:49 pm

2 stops35h 24m

$610

San FranciscoSofia

SFO - SOF

SFOSOF

San Francisco

Sun 11/30

2:40 pm-6:05 pm

1 stop17h 25m

Sofia

Sun 12/14

1:55 pm-7:35 pm

1 stop15h 40m

$614

San FranciscoSofia

SFO - SOF

SFOSOF

San Francisco

Thu 10/9

4:20 pm-12:30 am

2 stops22h 10m

$256

San FranciscoSofia

SFO - SOF

SFOSOF

San Francisco

Thu 10/9

7:30 pm-10:05 am

1 stop28h 35m

$471

San FranciscoSofia

SFO - SOF

SFOSOF

San Francisco

Wed 10/8

12:43 am-1:05 pm

2 stops26h 22m

$483

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/30

Best time to book a flight from Fremont to Sofia

Have a flexible travel schedule? Discover the best time to fly to Sofia from Fremont with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Fremont to Sofia

How far ahead should I book a flight from Fremont to Sofia?

Use this chart to determine the optimal time to book a round-trip flight from Fremont to Sofia. Price data was last updated on July 25, 2025.

The price you pay for your flight from Fremont to Sofia may vary depending on when you book. For the best chance of a lower fare, look to book 86 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from Fremont to Sofia?

Currently, November is the cheapest month in which you can book a flight from Fremont to Sofia (average of $632). Flying from Fremont to Sofia in June is currently the most expensive (average of $1,187). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from FR8 to SOF?

Find hourly flight availability from Fremont to Sofia. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 31, 2025.

When flying from Fremont to Sofia, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

What is the cheapest day to fly from Fremont to Sofia?

Use this chart to determine the cheapest time to fly round-trip from Fremont to Sofia. Price data was last updated on October 13, 2024.

Travelers seeking maximum savings on their Fremont to Sofia flight should consider departing on Thursday mornings when fares are most often at their lowest. Saturday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing Sofia

Get insights into the airlines that provide service to Sofia. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Sofia. Reviews last updated July 31, 2025.
Get a feel of what it's like to fly with SWISS, United Airlines, and Turkish Airlines from Fremont to Sofia by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
SWISS
7.5
Good
1,686 reviews

Food

7.1

Entertainment

6.8

Comfort

7.4

Boarding

7.7

Crew

8.2

Overall

7.5

Reviews

1 / 20
10.0
Excellent

Elwyn,Feb 2025

MXP - ZRH

The crew and the entire experience was fantastic! Would highly recommend the company and the flight
SWISS
7.5
Good
1,686 reviews
SWISS
7.5
Good
1,686 reviews

Food

7.1

Entertainment

6.8

Comfort

7.4

Boarding

7.7

Crew

8.2

Overall

7.5

Reviews

1 / 20
10.0
Excellent

Elwyn,Feb 2025

MXP - ZRH

The crew and the entire experience was fantastic! Would highly recommend the company and the flight
United Airlines
7.4
Good
8,900 reviews
SWISS
7.5
Good
1,686 reviews

Food

7.1

Entertainment

6.8

Comfort

7.4

Boarding

7.7

Crew

8.2

Overall

7.5

Reviews

1 / 20
10.0
Excellent

Elwyn,Feb 2025

MXP - ZRH

The crew and the entire experience was fantastic! Would highly recommend the company and the flight
Turkish Airlines
7.3
Good
3,933 reviews
SWISS
7.5
Good
1,686 reviews

Food

7.1

Entertainment

6.8

Comfort

7.4

Boarding

7.7

Crew

8.2

Overall

7.5

Reviews

1 / 20
10.0
Excellent

Elwyn,Feb 2025

MXP - ZRH

The crew and the entire experience was fantastic! Would highly recommend the company and the flight
American Airlines
7.2
Good
10,000 reviews
SWISS
7.5
Good
1,686 reviews

Food

7.1

Entertainment

6.8

Comfort

7.4

Boarding

7.7

Crew

8.2

Overall

7.5

Reviews

1 / 20
10.0
Excellent

Elwyn,Feb 2025

MXP - ZRH

The crew and the entire experience was fantastic! Would highly recommend the company and the flight
Air Canada
7.1
Good
9,851 reviews
SWISS
7.5
Good
1,686 reviews

Food

7.1

Entertainment

6.8

Comfort

7.4

Boarding

7.7

Crew

8.2

Overall

7.5

Reviews

1 / 20
10.0
Excellent

Elwyn,Feb 2025

MXP - ZRH

The crew and the entire experience was fantastic! Would highly recommend the company and the flight

Related info for your journey

Find useful and relevant information for your journey from Fremont to Sofia. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Sofia from Fremont?

    Sofia (SOF) is the airport you will fly into if you book a flight from Fremont to Sofia. You should not have trouble finding flights to Sofia from Fremont; the airport handles an average of 0 inbound flights from Fremont per day. You should also have plenty of airline options to choose from since 6 airlines have flights to the Sofia airport from Fremont. It is only a 4.2 mi journey from Sofia (SOF) to Sofia’s city center.

  • What are the cheapest airlines to fly from Fremont to Sofia one-way?

    One-way options have recently been found by users for as low as $456 on Turkish Airlines. Other airlines that offer cheap prices include SWISS from $471 and United Airlines from $483 one-way.

  • Can I find deals for flights from Fremont to Sofia that include hotel bookings?

    Yes. In addition to deals on Fremont to Sofia flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Fremont to Sofia?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Fremont to Sofia.

  • Can I find deals for business class flights from Fremont to Sofia?

    Yes. Cheapflights offers flight deals from Fremont to Sofia by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Fremont to Sofia?

    Currently, November is the cheapest month in which you can book a flight from Fremont to Sofia (average of $632). Flying from Fremont to Sofia in June is currently the most expensive (average of $1,187). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Top 6 airlines flying from Fremont to Sofia

Discover the top 6 airlines that operate flights from Fremont to Sofia. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
Turkish AirlinesCheapest$543Average$679FlexibilityNo cancel feeOn-time77%
British AirwaysCheapest$578Average$605FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$627Average$950FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$646Average$1,018FlexibilityNo cancel feeOn-time76%
ITA AirwaysCheapest$652Average$1,154FlexibilityNo cancel feeOn-time81%
Air CanadaCheapest$842Average$1,133FlexibilityNo cancel feeOn-time67%

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